Preparation

Preheat oven to 450°. Toss potatoes and 1 tablespoon oil on a large rimmed baking sheet; season with salt and pepper. Roast, turning once, until browned in spots, 10-15 minutes.

Meanwhile, rub chicken with garlic and season with salt and pepper. Heat 1 tablespoon oil in a large skillet over medium-high heat. Cook chicken skin side down until golden brown and crisp, 8-10 minutes.

Arrange chicken skin side up on baking sheet among potatoes. Roast until chicken is cooked through and potatoes are tender, 15-20 minutes longer.

Using a large spoon, lightly smash potatoes. Scatter kimchi over; roast until kimchi is warm, about 5 minutes.